Between Japanese and British politeness, this could have lasted much longer.
There's nothing more embarrassing than stepping on an escalator going the wrong way, unless it's being drunk on an escalator going the wrong way. Well, actually it could be worse if you're drunk on an escalator going the wrong way in a foreign country when you don't understand that the annoying gibberish-speaking locals are trying to help you. This eventually ended when someone pressed the emergency stop button, and the businessman looked around, realized what had happened, and walked out of the station without saying a word. For his sake, (and for his sake, like the drink, get it?) we hope he never remembers this dishonor.